Groups C and D conditions

With reference to Article 17 of the Order a public transport aeroplane classified in the certificate of airworthiness relating to the aeroplane issued or rendered valid by the Governor as an aeroplane of performance group C or of performance group D shall not fly or attempt to fly unless the weight of the aeroplane at the commencement of the take-off run is such that the following conditions are satisfied– (1) Such weight does not exceed the maximum take-off weight ascertained by reference to the flight manual relating to the aeroplane issued or rendered valid by the Governor as being appropriate to the height above mean sea level of and the air temperature at the aerodrome at which the take-off is to be made. (2) The take-off run required and the take-off distance required ascertained by reference to the said flight manual as being appropriate to – (a) the of the at the commencement of the take-off run; (b) the height above mean sea level of the aerodrome; (c) either the air temperature at the time of take- off or a temperature approved in respect of the aerodrome by the Governor; Civil Aviation 85 (d) the average slope of the surface of the aerodrome in the direction of take-off over the emergency distance available; (e) not more than fifty per cent. of the reported wind component opposite to the direction of take-off to less than one hundred and fifty per cent. of the reported wind component in the direction of take-off, do not exceed the take-off run available and the emergency distance available, respectively, at the aerodrome at which the take-off is to be made. (3) The net take-off flight path with all power units operating, ascertained by reference to the said flight manual as being appropriate to – (a) the of the at the commencement of the take-off run; (b) the height above mean sea level of the aerodrome; (c) either the air temperature at which the take-off is to be made or a temperature approved in respect of the aerodrome by the Governor; (d) not more than fifty per cent. of the reported wind component opposite to the direction of take-off or not less than one hundred and fifty per cent of the reported wind component in the direction of take-off, and plotted from a point 50 feet above the end of the take-off distance required at the aerodrome at which the take-off is to be made to the point at which the aeroplane reaches the minimum altitude for safe flight on the first stage of the route to be flown stated in or calculated from the information contained in the 86 Civil Aviation operations manual, shows that the aeroplane will clear by a safe margin any obstacle the distance from which to the nearest point on the ground below the intended line of flight of the aeroplane does not exceed 200 feet plus half the wing span of the (4) In assessing the ability of the aeroplane to satisfy this condition it shall not be assumed to make a change of direction of a radius less than the radius of steady turn specified in the said flight manual. (5) The aeroplane will, if it is classified in its certificate of airworthiness as an aeroplane of performance group C and if it is necessary for it to be flown solely by reference to instruments for any period before reaching the minimum altitude for safe flight on the first stage of the route to be flown, stated in, or calculated from the information contained in, the operations manual, during such period also satisfy condition (3) of regulation 36 of these Regulations. (6) The aeroplane will, in the meteorological conditions expected for the flight, in the event of any one power unit becoming inoperative at any point on its route or on any planned diversion therefrom, and with the other power units or power unit, if any, operating within the maximum continuous power conditions specified in the said flight manual – (a) in the case of an aeroplane classified as an aeroplane of performance group C, be capable of continuing the flight at altitudes not less than the relevant minimum altitudes for safe flight stated in, or calculated from the information contained in, the operations manual to a point 1,500 feet above an aerodrome at which a safe landing can be made and after arrival at that point be capable of maintaining that height; Civil Aviation 87 (b) in the case of an aeroplane classified as an aeroplane of performance group D, be capable of continuing the flight to a point 1,000 feet above a place at which a safe landing can be made, provided that in assessing the ability of the aeroplane to satisfy this condition it shall not be assumed to be capable of flying at any point on its route at an altitude exceeding the performance ceiling with all power units operating ascertained by reference to the said flight manual as being appropriate to its estimated weight at that point. (7) The weight of the aeroplane at the intended time of landing (hereinafter in this regulation called “the landing weight”), calculated by deducting the estimated weight of the fuel expected to be used on the flight from its weight at the commencement of the take-off run, will not exceed any of the maximum landing weights ascertained by reference to the said flight manual as being appropriate to the heights above mean sea level and the air temperatures forecast for the estimated time of landing at the aerodrome at which it is intended to land and at any alternate aerodrome. (8) The landing distance, ascertained by reference to the said flight manual as being appropriate to – (a) the landing weight; (b) the height above mean sea level of the aerodrome; (c) either the air temperature at the aerodrome forecast for the estimated time of landing or a temperature approved in respect of the aerodrome by the Governor; (d) still air conditions; 88 Civil Aviation (e) the average slope of the surface of the aerodrome in the direction of landing over the landing distance available, does not exceed seventy per cent. of the landing distance available at the aerodrome at which it is intended to land or at any alternate aerodrome. (9) The landing distance, ascertained by reference to the said flight manual as being appropriate to– (a) the landing weight; (b) the height above mean sea level of the aerodrome; (c) either the air temperature at the aerodrome forecast for the estimated time of landing or a temperature approved in respect of the aerodrome by the Governor; (d) not more than fifty per cent. of the forecast wind component opposite to the direction of landing or not more than one hundred and fifty per cent. of the forecast wind component in the direction of landing; (e) the average slope of the surface of the aerodrome in the direction of landing over the landing distance available, does not exceed seventy per cent. of the landing distance available at the aerodrome at which it is intended to land or at any alternate aerodrome.